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<meta charset=utf-8>
<meta name="timeout" content="long">
<title>RTCPeerConnection payload type demuxing</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../RTCPeerConnection-helper.js"></script>
<script>
'use strict';
promise_test(async t => {
  const caller = new RTCPeerConnection();
  t.add_cleanup(() => caller.close());
  const callee = new RTCPeerConnection();
  t.add_cleanup(() => callee.close());
  exchangeIceCandidates(caller, callee);

  const stream = await getNoiseStream({video: true});
  t.add_cleanup(() => stream.getTracks().forEach(track => track.stop()));
  stream.getTracks().forEach(track => caller.addTrack(track, stream));
  stream.getTracks().forEach(track => caller.addTrack(track.clone(), stream.clone()));

  let callCount = 0;
  let metadataToBeLoaded = new Promise(resolve => {
    callee.ontrack = (e) => {
      const stream = e.streams[0];
      const v = document.createElement('video');
      v.autoplay = true;
      v.srcObject = stream;
      v.id = stream.id
      v.addEventListener('loadedmetadata', () => {
        if (++callCount === 2) {
          resolve();
        }
      });
    };
  });

  // Restrict first transceiver to VP8, second to H264.
  const {codecs} = RTCRtpSender.getCapabilities('video');
  const vp8 = codecs.find(c => c.mimeType === 'video/VP8');
  const h264 = codecs.find(c => c.mimeType === 'video/H264');
  caller.getTransceivers()[0].setCodecPreferences([vp8]);
  caller.getTransceivers()[1].setCodecPreferences([h264]);

  const offer = await caller.createOffer();
  // Replace the mid header extension and all ssrc lines
  // with bogus. The receiver will be forced to do payload type demuxing.
  const sdp = offer.sdp
    .replace(/rtp-hdrext:sdes/g, 'rtp-hdrext:something')
    .replace(/a=ssrc:/g, 'a=notssrc');

  await callee.setRemoteDescription({type: 'offer', sdp});
  await caller.setLocalDescription(offer);

  const answer = await callee.createAnswer();
  await caller.setRemoteDescription(answer);
  await callee.setLocalDescription(answer);

  assert_equals(callee.getReceivers().length, 2);

  await metadataToBeLoaded;
}, 'Can demux two video tracks with different payload types on a bundled connection');

promise_test(async t => {
  const caller = new RTCPeerConnection({bundlePolicy: 'max-compat'});
  t.add_cleanup(() => caller.close());
  const callee = new RTCPeerConnection();
  t.add_cleanup(() => callee.close());
  exchangeIceCandidates(caller, callee);

  const stream = await getNoiseStream({video: true});
  t.add_cleanup(() => stream.getTracks().forEach(track => track.stop()));
  stream.getTracks().forEach(track => caller.addTrack(track, stream));
  stream.getTracks().forEach(track => caller.addTrack(track.clone(), stream.clone()));

  let callCount = 0;
  let metadataToBeLoaded = new Promise(resolve => {
    callee.ontrack = (e) => {
      const stream = e.streams[0];
      const v = document.createElement('video');
      v.autoplay = true;
      v.srcObject = stream;
      v.id = stream.id
      v.addEventListener('loadedmetadata', () => {
        if (++callCount === 2) {
          resolve();
        }
      });
    };
  });

  const offer = await caller.createOffer();
  // Replace BUNDLE, the mid header extension and all ssrc lines
  // with bogus. The receiver will be forced to do payload type demuxing
  // which is still possible because the different m-lines arrive on
  // different ports/sockets.
  const sdp = offer.sdp.replace('BUNDLE', 'SOMETHING')
    .replace(/rtp-hdrext:sdes/g, 'rtp-hdrext:something')
    .replace(/a=ssrc:/g, 'a=notssrc');

  await callee.setRemoteDescription({type: 'offer', sdp});
  await caller.setLocalDescription(offer);

  const answer = await callee.createAnswer();
  await caller.setRemoteDescription(answer);
  await callee.setLocalDescription(answer);

  assert_equals(callee.getReceivers().length, 2);

  await metadataToBeLoaded;
}, 'Can demux two video tracks with the same payload type on an unbundled connection');

</script>
